<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">

          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>

          <!--
          v-show：是否显示上传组件
          :key：类似于id，如果一个页面多个图片上传控件，可以做区分
          :url：后台上传的url地址
          @close：关闭上传组件
          @crop-upload-success：上传成功后的回调 -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'/oss/file/upload'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>

      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
    components: { ImageCropper, PanThumb },//引用模块
    data() {
        return {
            teacher: {},
            saveBtnDisabled: false, // 保存按钮是否禁用
            imagecropperShow: false, //默认不显示上传组件
            imagecropperKey: 0,  // 上传组件id
            BASE_API: process.env.BASE_API // 接口API地址
        }
    },
    created(){
        this.init()
    },
    watch: {//监听
        $route(to, from) {//当路由发生改变时调用此方法
            console.log('watch $route')
            this.init()
        }
    },
    methods: {
        init(){
            //根据参数判断是添加还是修改
            if (this.$route.params && this.$route.params.id) {
                const id = this.$route.params.id
                this.getTeacher(id)
            }else{//添加需要把teacher值清空
                this.teacher = {}
            }
        },

        saveOrUpdate() {
            this.saveBtnDisabled = true
            if(!this.teacher.id){
                this.saveData()
            }else{
                this.update()
            }
        },

        // 保存
        saveData() {
            teacherApi.save(this.teacher).then(() => {
                this.$message.success("添加成功！")
                //回到列表页面 跳转路由
                this.$router.push({path:'/edu/teacher/list'})
            })
        },
        update(){
            teacherApi.updateById(this.teacher).then(()=>{
                this.$message.success("修改成功！")
                //回到列表页面 跳转路由
                this.$router.push({path:'/edu/teacher/list'})
            })
        },

        //根据id查询
        getTeacher(id){
            teacherApi.getInfoById(id).then((res)=>{
                this.teacher = res.data.item
            }).catch(()=>{
                this.$message.error("获取数据失败")
            })
        },

        //关闭组件
        close(){
          this.imagecropperShow=false
          //上传组件初始化
          this.imagecropperKey += 1
        },
        //上传成功
        cropSuccess(data){
          this.imagecropperShow=false
          this.teacher.avatar = data.avatar
          //上传组件初始化
          this.imagecropperKey += 1
        }


  }
}
</script>